C++ cass_future_wait函数代码示例

int main() {
  CassCluster* cluster = create_cluster();
  CassSession* session = cass_session_new();
  CassFuture* close_future = NULL;

  const Pair items[] = { { "apple", 1 }, { "orange", 2 }, { "banana", 3 }, { "mango", 4 }, { NULL, 0 } };

  if (connect_session(session, cluster) != CASS_OK) {
    cass_cluster_free(cluster);
    cass_session_free(session);
    return -1;
  }

  execute_query(session,
                "CREATE KEYSPACE examples WITH replication = { \
                'class': 'SimpleStrategy', 'replication_factor': '3' };");

  execute_query(session,
                "CREATE TABLE examples.maps (key text, \
                items map<text, int>, \
                PRIMARY KEY (key))");


  insert_into_maps(session, "test", items);
  select_from_maps(session, "test");

  close_future = cass_session_close(session);
  cass_future_wait(close_future);
  cass_future_free(close_future);

  cass_cluster_free(cluster);
  cass_session_free(session);

  return 0;
}

CassError insert_into_collections(CassSession* session, const char* key, const char* items[]) {
  CassError rc = CASS_OK;
  CassStatement* statement = NULL;
  CassFuture* future = NULL;
  CassCollection* collection = NULL;
  const char** item = NULL;
  const char* query = "INSERT INTO examples.collections (key, items) VALUES (?, ?);";

  statement = cass_statement_new(query, 2);

  cass_statement_bind_string(statement, 0, key);

  collection = cass_collection_new(CASS_COLLECTION_TYPE_SET, 2);
  for (item = items; *item; item++) {
    cass_collection_append_string(collection, *item);
  }
  cass_statement_bind_collection(statement, 1, collection);
  cass_collection_free(collection);

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    print_error(future);
  }

  cass_future_free(future);
  cass_statement_free(statement);

  return rc;
}

	static void ClearDatabase(Upload& upload) {
		DatabaseSession session;

		std::string str = "delete from uploadchunks where model_id = ? and upload_id = ?";
		CassStatement* statement = cass_statement_new(str.c_str(), 2);

		cass_statement_bind_uuid(statement, 0, upload.ModelId());
		cass_statement_bind_uuid(statement, 1, upload.UploadId());

		CassFuture* future = cass_session_execute(session.Session(), statement);
		cass_future_wait(future);
		cass_statement_free(statement);

		CassError rc = cass_future_error_code(future);

		if (rc != CASS_OK) {

			std::string err = std::string("Failed to execute query: ")
				+ CassandraUtils::GetCassandraError(future);

			cass_future_free(future);

			throw err;
		}
		cass_future_free(future);
	}

int main() {
  CassFuture* connect_future = NULL;
  CassCluster* cluster = cass_cluster_new();
  CassSession* session = cass_session_new();
  cass_cluster_set_contact_points(cluster, "127.0.0.1");

  connect_future = cass_session_connect(session, cluster);

  if (cass_future_error_code(connect_future) == CASS_OK) {
    CassFuture* close_future = NULL;

    execute_query(session,
                  "CREATE KEYSPACE examples WITH replication = { \
                  'class': 'SimpleStrategy', 'replication_factor': '3' };");

    print_keyspace(session, "examples");

    execute_query(session,
                  "CREATE TABLE examples.schema_meta (key text, \
                  value bigint, \
                  PRIMARY KEY (key));");

    print_table(session, "examples", "schema_meta");

    /* Close the session */
    close_future = cass_session_close(session);
    cass_future_wait(close_future);
    cass_future_free(close_future);
  } else {

CassError insert_into_basic(CassSession* session, const char* key, const Basic* basic) {
  CassError rc = CASS_OK;
  CassStatement* statement = NULL;
  CassFuture* future = NULL;

  const char* query
    = "INSERT INTO examples.basic (key, bln, flt, dbl, i32, i64) VALUES (:k, :b, :f, :d, :i32, :i64);";

  statement = cass_statement_new(query, 6);

  cass_statement_bind_string_by_name(statement, "k", key);
  cass_statement_bind_bool_by_name(statement, "b", basic->bln);
  cass_statement_bind_float_by_name(statement, "f", basic->flt);
  cass_statement_bind_double_by_name(statement, "d", basic->dbl);
  cass_statement_bind_int32_by_name(statement, "i32", basic->i32);
  cass_statement_bind_int64_by_name(statement, "i64", basic->i64);

  future = cass_session_execute(session, statement);

  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    print_error(future);
  }

  cass_future_free(future);
  cass_statement_free(statement);

  return rc;
}

    bool select_task(const std::string& query, CassConsistency consistency, int num_iterations) {
        bool is_successful = true;

        test_utils::CassStatementPtr statement(cass_statement_new(query.c_str(), 0));
        cass_statement_set_consistency(statement.get(), consistency);
        for (int i = 0; i < num_iterations; ++i) {
            test_utils::CassFuturePtr future(cass_session_execute(session, statement.get()));
            cass_future_wait(future.get());

            CassError code = cass_future_error_code(future.get());
            if (code != CASS_OK
                    && code != CASS_ERROR_LIB_REQUEST_TIMED_OUT
                    && code != CASS_ERROR_SERVER_READ_TIMEOUT) { // Timeout is okay
                CassString message;
                cass_future_error_message(future.get(), &message.data, &message.length);
                fprintf(stderr, "Error occurred during select '%.*s'\n", static_cast<int>(message.length), message.data);
                is_successful = false;
            }

            if (code == CASS_OK) {
                test_utils::CassResultPtr result(cass_future_get_result(future.get()));
                if (cass_result_row_count(result.get()) == 0) {
                    fprintf(stderr, "No rows returned from query\n");
                    is_successful = false;
                }
            }
        }

        return is_successful;
    }

CassError insert_into_basic(CassSession* session, const char* key, const Basic* basic) {
  CassError rc = CASS_OK;
  CassStatement* statement = NULL;
  CassFuture* future = NULL;
  const char* query = "INSERT INTO examples.basic (key, bln, flt, dbl, i32, i64) VALUES (?, ?, ?, ?, ?, ?);";

  statement = cass_statement_new(query, 6);

  cass_statement_bind_string(statement, 0, key);
  cass_statement_bind_bool(statement, 1, basic->bln);
  cass_statement_bind_float(statement, 2, basic->flt);
  cass_statement_bind_double(statement, 3, basic->dbl);
  cass_statement_bind_int32(statement, 4, basic->i32);
  cass_statement_bind_int64(statement, 5, basic->i64);

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    print_error(future);
  }

  cass_future_free(future);
  cass_statement_free(statement);

  return rc;
}

CassError insert_into(CassSession* session, const char* key) {
  CassError rc = CASS_OK;
  CassStatement* statement = NULL;
  CassFuture* future = NULL;
  cass_uint32_t d;
  cass_int64_t t;
  const char* query = "INSERT INTO examples.date_time (key, d, t) VALUES (?, ?, ?);";
  time_t now = time(NULL);

  d = cass_date_from_epoch(now);
  t = cass_time_from_epoch(now);

  statement = cass_statement_new(query, 3);

  cass_statement_bind_string(statement, 0, key);
  cass_statement_bind_uint32(statement, 1, d);
  cass_statement_bind_int64(statement, 2, t);

  future = cass_session_execute(session, statement);
  cass_future_wait(future);

  rc = cass_future_error_code(future);
  if (rc != CASS_OK) {
    print_error(future);
  }

  cass_future_free(future);
  cass_statement_free(statement);

  return rc;
}

  bool execute_insert(CassSession* session, const std::string& table_name) {
    std::string query = str(boost::format("INSERT INTO %s (id, event_time, text_sample) VALUES (?, ?, ?)") % table_name);
    test_utils::CassStatementPtr statement(cass_statement_new(query.c_str(), 3));

    // Determine if bound parameters can be used based on C* version
    if (version.major == 1) {
      test_utils::CassPreparedPtr prepared = test_utils::prepare(session, query.c_str());
      statement = test_utils::CassStatementPtr(cass_prepared_bind(prepared.get()));
    }

    boost::chrono::system_clock::time_point now(boost::chrono::system_clock::now());
    boost::chrono::milliseconds event_time(boost::chrono::duration_cast<boost::chrono::milliseconds>(now.time_since_epoch()));
    std::string text_sample(test_utils::string_from_time_point(now));

    cass_statement_bind_uuid(statement.get(), 0, test_utils::generate_time_uuid(uuid_gen));
    cass_statement_bind_int64(statement.get(), 1, event_time.count());
    cass_statement_bind_string(statement.get(), 2, text_sample.c_str());

    test_utils::CassFuturePtr future(cass_session_execute(session, statement.get()));
    cass_future_wait(future.get());
    CassError code = cass_future_error_code(future.get());
    if (code != CASS_OK && code != CASS_ERROR_LIB_REQUEST_TIMED_OUT) { // Timeout is okay
      CassString message;
      cass_future_error_message(future.get(), &message.data, &message.length);
      fprintf(stderr, "Error occurred during insert '%.*s'\n", static_cast<int>(message.length), message.data);
      return false;
    }

    return true;
  }

  ~LatencyAwarePolicyTest() {
    stop_query_execution();
    uv_mutex_destroy(&lock_);
    uv_cond_destroy(&condition_);

    test_utils::CassFuturePtr close_future(cass_session_close(session_.get()));
    cass_future_wait(close_future.get());
  }

/**
* Closes the session instance and waits for in-flight requests to finish.
*/
int lua_cass_session_close (lua_State* L)
{
	fprintf(stderr, "lua_cass_session_close\n");
	CassSession* session = lua_session_get_ptr(L, 1);
	CassFuture* future = cass_session_close(session);
	cass_future_wait(future);
	cass_future_free(future);
	return 0;
}

CassDriver::~CassDriver() {
  cass_prepared_free(insert_prepared_);
  cass_prepared_free(select_prepared_);
  cass_prepared_free(delete_prepared_);
  CassFuture* close_future = cass_session_close(session_);
  cass_future_wait(close_future);
  cass_future_free(close_future);
  cass_cluster_free(cluster_);
}

SingleSessionTest::~SingleSessionTest() {
  if (session) {
    CassFuturePtr close_future(cass_session_close(session));
    cass_future_wait(close_future.get());
  }
  if (ssl) {
    cass_ssl_free(ssl);
  }
}

void wait_exit() {
  uv_mutex_lock(&mutex);
  while (close_future == NULL) {
    uv_cond_wait(&cond, &mutex);
  }
  uv_mutex_unlock(&mutex);
  cass_future_wait(close_future);
  cass_future_free(close_future);
}

void wait_exit() {
  uv_mutex_lock(&mutex);
  while (exit_flag == 0) {
    uv_cond_wait(&cond, &mutex);
  }
  uv_mutex_unlock(&mutex);
  if (close_future) {
    cass_future_wait(close_future);
    cass_future_free(close_future);
  }
}